INTERIOR - Supplemental Restraint System (SRS) 6-27
FIT VERIFICATION MECHANISM
The mechanism is used to electrically check the engagement of
the connector between the SRS diagnosis unit and the body
wiring harness. The operating principle is described below.
(1) Securely connect the SRS diagnosis unit and harness side
connectors and press the secondary lock lever down to lock
the connectors.
(2) At this time, the short bar provided on the rear surface of the
secondary lock lever produces a short circuit across
terminals No. 7 and 8 of the SRS diagnosis unit. The SRS
diagnosis unit supplies monitoring current to the circuit to
electrically verify that the connectors have been locked.
CONNECTOR SHORTING MECHANISM
The mechanism is designed for prevention of accidental
explosion of the inflator when the clock spring connector (for the
squib circuit) is removed from the SRS diagnosis unit. The
operating principle is described below.
When Connectors Are Fitted
When the SRS diagnosis unit and clock spring connector are
coupled, the circuit between the short terminals and clock spring
connector terminals are kept in the OFF state by the partition
plate provided in the connector of the SRS diagnosis unit.
When Connectors Are Disconnected
When the clock spring connectors are disconnected from the
SRS diagnosis unit, the partition plate between the short
terminals and clock spring connector terminals is removed. As a
result, a short circuit is formed between the two poles of the clock
spring connector terminals to prevent generation of a potential
difference (current) between the squib terminals.
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